Furnace.



F. A. WINCHELL.

FURNACE.

APPLICATION FILED JULY 26, l9l'5. 1,177,839, Patented Apr. 4, 1916.

2 swans-swan 1.

attozueq F. A. WINCHELL.

FURNACE.

APPLICAHON FILED JULY 26. 1915.

Patented Apr. 4, 1916.

2 SHEETS-SHEET 2.

Suva Mo's I llfiederzii attorney v UNITED STATES PATENT OFFICE.

FREDERICK A. WI-NoirELL. 0E WACO, TEXAS.

FURNACE.

Specificationof Letters Patent.

Patented Apr. 4, 1916.:

Application fiieuui 2c, 1915. Serial No. 42,014.

To all whom it may concern Be it known that I, FREDERICK A. VIN- cHELL, a citizen of the United States, residing at Waco, county of McLennan, and State of Texas, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to furnaces, and more particularly to that class of furnaces sometimes called field furnaces, and aims primarily to simplify the general construction of such devices.

A further object of the invention is to provide a furnace of this character in which may be readily taken apart and packed to occupy but a small space A still further and particular object of the invention is to provide a field furnace capable of having its heating chamber enlarged or contracted in order to snugly engage the walls of kettles or other containers with which it is adapted to be used of various sizes or diameters.

With these objects in view, together with others which will appear as the description proceeds, the invention resides in the novel combinationand arrangement of parts all as will be described more fully hereinafter and particularly pointed out in the claims.

The invention will be better understood by reference to the accompanying draw ings, wherein Figure 1 is a side elevation of a field or portable furnace constructed in accordance with my invention, Fig. 2 is a top plan view of the device illustrated in Fig. 1, the smoke pipe being removed, Fig. 3 is a transverse section taken through the furnace illustrated in Fig. 1 and illustrating the application of a vessel to the improved furnace, Fig. 4 is a horizontal section taken substan tially upon the line 4--l of Fig. 8, and Fig. 5 is a fragmentary detail section of the lower portion of the furnace illustrating a slightly modified form of the invention.

Referring now more particularly to the drawings, 6 represents generally the combustion chamber or fire box of the improved furnace, and 7 the heating chamber thereof. The furnace, being adapted particularly to be used in the field and upon the ground for various purposes, is constructed without a bottom, in order to simplify the construction and at the same time lighten the weight of the furnace and to lessen the cost of manufacture of the same, and the walls of the fire box or combustion chamber are provided as at 8 with a conventional draft regulating device, and at 9 with a door to permit of the introduction of fuel to the fire within the combustion chamber. Y

The heating chamber 7 is located above the fire box, and is of substantially broader dimensions than the fire box in order to v provide a shoulder 10 at its juncture therewith for the support of the vessels with which the furnace is to be used, and also to enable the said vessels to cooperate with the upper walls of the furnace structure in providing a channelor passage 11 through which the heat from the fire pot. passes to a. flue 12, and to ultimately escape to the atmosphere through the smoke pipe or stack 13. Tothis end the walls of-the furnace above the fire boX are bulged outwardly. and upwardly providing the shoulder 10 and the channel or passage 11, as above described and are then extended inwardly as at 14: adjacent the extreme upper end of. the

furnace to provide a kettle or vessel engaging flange 15.

At a point preferably diametrically opposite that in which the draft regulating shutter 8 is located, the walls of the furnace are so formed as to provide a duct 16 communicating at one end with the fire pot, and at its other end with the heating chamber}, in order that the heat may pass from the combustion chamber to the channel 11 in the her at a point preferably diametrically-opposite that to which the heat and smoke are introduced to the heating chamber through the duct 16 in order that the products of combustion must take a circuitous or tortuous course through the passage or channel 11. formed between the wallsof the heating chamber and the sides ofthe vessel seated within the furnace before escapingto the atmosphere through the chimney or smoke stack 13. A conventional damper 17 is positioned within the smokepipe 13 in order that the draft maybe properly regu lated.

From this construction it will be observed that upon building a fire within the fire box 6, and placing the kettle containing the matter to be heated. within the upper open end of the furnace to rest within the heating chamber upon the shoulder 10, the heat and smoke from the fire will rise and contact the bottom of the kettle, and will then pass through the duct 16 to the heating chamber 7, passing through the channel or passage formed between the walls of the heating chamber and of the kettle, constantly in contact with the latter, to escape to the atmosphere through the flue 12 and smoke stack or pipe 13. It is apparent that the greatest amount of heat is thus derived from the fire, which obviously lessens the amount of fuel necessary to be used, and heats the contents of the vessel more rapidly. The fire for devices of this kind is usually kindled with wood, corn cobs, chips and the like and of course it is to be under: stood that fuel of any description maybe used in the improved furnace.

In furnaces of this type it is essential, in effecting a perfect draft for the fire, that a tight joint be formed between the walls of the kettle and the edges of the open end of the furnace to prevent the escape of smoke and heat at such places, and to insure its passage through the flue, and to this end, and also to enable the device to be disassembled and packed in but small space, the improved furnace isconstructed of a plurality of cooperating sections. For convenience in illustration the device is shown as being substantially circular in cross section, and is composed of sections '18, 19, 20 and 21, each being arcuate and provided at one end with a slightly outwardly oflset flange 22 adapted to overlap or slide upon the adjacent end 23 of the neXt cooperating section, the said overlapped ends being provided with elongated registering slots 24 through which bolts 25 may be inserted to hold the device properly assembled in diflerent degrees of adjustment.

Each of the sections above described are formed at their upper ends with flared portions as shown to cooperatein forming the Copies of'this patent may be obtained for five cents each, by addressing the shoulder 10, heating chamber 7, and chan-: nel 11, the sections 18 and '20 being formedwiththe duct 16 and flue portion 12 respectively. Sections 20 and 21 are provided respectively with the draft regulating device 8' and fuel feeding door 9.

From this description it is apparent that the sections maybe quicklyand easily as sembled to provide a light and thoroughly efficient furnace, and by reason of the adjustability of the various sections the furnace may be expanded or contracted later-' ally to permit of the: introduction to theheating chamber of kettles or other vessels of various diameters and toinsure a tight fit at the upper end of'the heating chamber around the Walls of the kettle to prevent the escape of the products of combustion.-

When it is desired touse the furnace indoors, I provide a baseor support 26, substantially similar in shape to the cross diameter of the fire box, but being of a trifle greater dimension to permit of adjustability of the furnace. This base constitutes a plate, supported spaced from the floor or ground upon legs 27, and is provided at its edges with upturned flanges 28 to prevent the device from extending overthe edges of the support to be upset, or to prevent live coals from escaping from the bottom of the fire pot to the floor.

I claim 1. A furnace comprising a plurality ofarcuate sections all adapted to be arranged together to provide an annular firepot, a

heating chamber for the reception of a kettie, and a fine, the adjacent edges of said sections being in overlapped relation to-per mit of contraction or enlargement of the diameter of said furnace to fit said kettle, the said overlapped ends being provided with registering elongated slots, and bolts engaging through said "slots, substantially as described. I

2. A furnace, open at the bottom and adjustable to vary its transverse dimensions,

in combination with a plate forming a do surefor said open end, and providedfwith Washington, D. 6,

Commissioner of Patents. 

